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- /* Copyright (c) 2003-2004, Roger Dingledine
- * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
- * Copyright (c) 2007-2012, The Tor Project, Inc. */
- /* See LICENSE for licensing information */
- #ifndef TOR_COMPAT_H
- #define TOR_COMPAT_H
- #include "orconfig.h"
- #include "torint.h"
- #ifdef _WIN32
- #ifndef _WIN32_WINNT
- #define _WIN32_WINNT 0x0501
- #endif
- #define WIN32_LEAN_AND_MEAN
- #if defined(_MSC_VER) && (_MSC_VER < 1300)
- #include <winsock.h>
- #else
- #include <winsock2.h>
- #include <ws2tcpip.h>
- #endif
- #endif
- #ifdef HAVE_SYS_PARAM_H
- #include <sys/param.h>
- #endif
- #ifdef HAVE_SYS_TYPES_H
- #include <sys/types.h>
- #endif
- #ifdef HAVE_SYS_TIME_H
- #include <sys/time.h>
- #endif
- #ifdef HAVE_TIME_H
- #include <time.h>
- #endif
- #ifdef HAVE_STRING_H
- #include <string.h>
- #endif
- #if defined(HAVE_PTHREAD_H) && !defined(_WIN32)
- #include <pthread.h>
- #endif
- #include <stdarg.h>
- #ifdef HAVE_SYS_RESOURCE_H
- #include <sys/resource.h>
- #endif
- #ifdef HAVE_SYS_SOCKET_H
- #include <sys/socket.h>
- #endif
- #ifdef HAVE_NETINET_IN_H
- #include <netinet/in.h>
- #endif
- #ifdef HAVE_NETINET6_IN6_H
- #include <netinet6/in6.h>
- #endif
- #include <stdio.h>
- #if defined (WINCE)
- #include <fcntl.h>
- #include <io.h>
- #include <math.h>
- #include <projects.h>
- #define snprintf _snprintf
- /* this is not exported as W .... */
- #define SHGetPathFromIDListW SHGetPathFromIDList
- /* wcecompat has vasprintf */
- #define HAVE_VASPRINTF
- /* no service here */
- #ifdef NT_SERVICE
- #undef NT_SERVICE
- #endif
- #endif // WINCE
- #ifndef NULL_REP_IS_ZERO_BYTES
- #error "It seems your platform does not represent NULL as zero. We can't cope."
- #endif
- #if 'a'!=97 || 'z'!=122 || 'A'!=65 || ' '!=32
- #error "It seems that you encode characters in something other than ASCII."
- #endif
- /* ===== Compiler compatibility */
- /* GCC can check printf types on arbitrary functions. */
- #ifdef __GNUC__
- #define CHECK_PRINTF(formatIdx, firstArg) \
- __attribute__ ((format(printf, formatIdx, firstArg)))
- #else
- #define CHECK_PRINTF(formatIdx, firstArg)
- #endif
- /* inline is __inline on windows. */
- #ifdef _WIN32
- #define INLINE __inline
- #else
- #define INLINE inline
- #endif
- /* Try to get a reasonable __func__ substitute in place. */
- #if defined(_MSC_VER)
- /* MSVC compilers before VC7 don't have __func__ at all; later ones call it
- * __FUNCTION__. */
- #if _MSC_VER < 1300
- #define __func__ "???"
- #else
- #define __func__ __FUNCTION__
- #endif
- #else
- /* For platforms where autoconf works, make sure __func__ is defined
- * sanely. */
- #ifndef HAVE_MACRO__func__
- #ifdef HAVE_MACRO__FUNCTION__
- #define __func__ __FUNCTION__
- #elif HAVE_MACRO__FUNC__
- #define __func__ __FUNC__
- #else
- #define __func__ "???"
- #endif
- #endif /* ifndef MAVE_MACRO__func__ */
- #endif /* if not windows */
- #if defined(_MSC_VER) && (_MSC_VER < 1300)
- /* MSVC versions before 7 apparently don't believe that you can cast uint64_t
- * to double and really mean it. */
- extern INLINE double U64_TO_DBL(uint64_t x) {
- int64_t i = (int64_t) x;
- return (i < 0) ? ((double) INT64_MAX) : (double) i;
- }
- #define DBL_TO_U64(x) ((uint64_t)(int64_t) (x))
- #else
- #define U64_TO_DBL(x) ((double) (x))
- #define DBL_TO_U64(x) ((uint64_t) (x))
- #endif
- /* GCC has several useful attributes. */
- #if defined(__GNUC__) && __GNUC__ >= 3
- #define ATTR_NORETURN __attribute__((noreturn))
- #define ATTR_CONST __attribute__((const))
- #define ATTR_MALLOC __attribute__((malloc))
- #define ATTR_NORETURN __attribute__((noreturn))
- /* Alas, nonnull is not at present a good idea for us. We'd like to get
- * warnings when we pass NULL where we shouldn't (which nonnull does, albeit
- * spottily), but we don't want to tell the compiler to make optimizations
- * with the assumption that the argument can't be NULL (since this would make
- * many of our checks go away, and make our code less robust against
- * programming errors). Unfortunately, nonnull currently does both of these
- * things, and there's no good way to split them up.
- *
- * #define ATTR_NONNULL(x) __attribute__((nonnull x)) */
- #define ATTR_NONNULL(x)
- /** Macro: Evaluates to <b>exp</b> and hints the compiler that the value
- * of <b>exp</b> will probably be true.
- *
- * In other words, "if (PREDICT_LIKELY(foo))" is the same as "if (foo)",
- * except that it tells the compiler that the branch will be taken most of the
- * time. This can generate slightly better code with some CPUs.
- */
- #define PREDICT_LIKELY(exp) __builtin_expect(!!(exp), 1)
- /** Macro: Evaluates to <b>exp</b> and hints the compiler that the value
- * of <b>exp</b> will probably be false.
- *
- * In other words, "if (PREDICT_UNLIKELY(foo))" is the same as "if (foo)",
- * except that it tells the compiler that the branch will usually not be
- * taken. This can generate slightly better code with some CPUs.
- */
- #define PREDICT_UNLIKELY(exp) __builtin_expect(!!(exp), 0)
- #else
- #define ATTR_NORETURN
- #define ATTR_CONST
- #define ATTR_MALLOC
- #define ATTR_NORETURN
- #define ATTR_NONNULL(x)
- #define PREDICT_LIKELY(exp) (exp)
- #define PREDICT_UNLIKELY(exp) (exp)
- #endif
- /** Expands to a syntactically valid empty statement. */
- #define STMT_NIL (void)0
- /** Expands to a syntactically valid empty statement, explicitly (void)ing its
- * argument. */
- #define STMT_VOID(a) while (0) { (void)(a); }
- #ifdef __GNUC__
- /** STMT_BEGIN and STMT_END are used to wrap blocks inside macros so that
- * the macro can be used as if it were a single C statement. */
- #define STMT_BEGIN (void) ({
- #define STMT_END })
- #elif defined(sun) || defined(__sun__)
- #define STMT_BEGIN if (1) {
- #define STMT_END } else STMT_NIL
- #else
- #define STMT_BEGIN do {
- #define STMT_END } while (0)
- #endif
- /* ===== String compatibility */
- #ifdef _WIN32
- /* Windows names string functions differently from most other platforms. */
- #define strncasecmp _strnicmp
- #define strcasecmp _stricmp
- #endif
- #ifndef HAVE_STRLCAT
- size_t strlcat(char *dst, const char *src, size_t siz) ATTR_NONNULL((1,2));
- #endif
- #ifndef HAVE_STRLCPY
- size_t strlcpy(char *dst, const char *src, size_t siz) ATTR_NONNULL((1,2));
- #endif
- #ifdef _MSC_VER
- /** Casts the uint64_t value in <b>a</b> to the right type for an argument
- * to printf. */
- #define U64_PRINTF_ARG(a) (a)
- /** Casts the uint64_t* value in <b>a</b> to the right type for an argument
- * to scanf. */
- #define U64_SCANF_ARG(a) (a)
- /** Expands to a literal uint64_t-typed constant for the value <b>n</b>. */
- #define U64_LITERAL(n) (n ## ui64)
- #define I64_PRINTF_ARG(a) (a)
- #define I64_SCANF_ARG(a) (a)
- #define I64_LITERAL(n) (n ## i64)
- #else
- #define U64_PRINTF_ARG(a) ((long long unsigned int)(a))
- #define U64_SCANF_ARG(a) ((long long unsigned int*)(a))
- #define U64_LITERAL(n) (n ## llu)
- #define I64_PRINTF_ARG(a) ((long long signed int)(a))
- #define I64_SCANF_ARG(a) ((long long signed int*)(a))
- #define I64_LITERAL(n) (n ## ll)
- #endif
- #if defined(_MSC_VER) || defined(__MINGW32__) || defined(__MINGW64__)
- /** The formatting string used to put a uint64_t value in a printf() or
- * scanf() function. See also U64_PRINTF_ARG and U64_SCANF_ARG. */
- #define U64_FORMAT "%I64u"
- #define I64_FORMAT "%I64d"
- #else
- #define U64_FORMAT "%llu"
- #define I64_FORMAT "%lld"
- #endif
- /** Represents an mmaped file. Allocated via tor_mmap_file; freed with
- * tor_munmap_file. */
- typedef struct tor_mmap_t {
- const char *data; /**< Mapping of the file's contents. */
- size_t size; /**< Size of the file. */
- /* None of the fields below should be accessed from outside compat.c */
- #ifdef HAVE_SYS_MMAN_H
- size_t mapping_size; /**< Size of the actual mapping. (This is this file
- * size, rounded up to the nearest page.) */
- #elif defined _WIN32
- HANDLE mmap_handle;
- #endif
- } tor_mmap_t;
- tor_mmap_t *tor_mmap_file(const char *filename) ATTR_NONNULL((1));
- void tor_munmap_file(tor_mmap_t *handle) ATTR_NONNULL((1));
- int tor_snprintf(char *str, size_t size, const char *format, ...)
- CHECK_PRINTF(3,4) ATTR_NONNULL((1,3));
- int tor_vsnprintf(char *str, size_t size, const char *format, va_list args)
- CHECK_PRINTF(3,0) ATTR_NONNULL((1,3));
- int tor_asprintf(char **strp, const char *fmt, ...)
- CHECK_PRINTF(2,3);
- int tor_vasprintf(char **strp, const char *fmt, va_list args)
- CHECK_PRINTF(2,0);
- const void *tor_memmem(const void *haystack, size_t hlen, const void *needle,
- size_t nlen) ATTR_NONNULL((1,3));
- static const void *tor_memstr(const void *haystack, size_t hlen,
- const char *needle) ATTR_NONNULL((1,3));
- static INLINE const void *
- tor_memstr(const void *haystack, size_t hlen, const char *needle)
- {
- return tor_memmem(haystack, hlen, needle, strlen(needle));
- }
- /* Much of the time when we're checking ctypes, we're doing spec compliance,
- * which all assumes we're doing ASCII. */
- #define DECLARE_CTYPE_FN(name) \
- static int TOR_##name(char c); \
- extern const uint32_t TOR_##name##_TABLE[]; \
- static INLINE int TOR_##name(char c) { \
- uint8_t u = c; \
- return !!(TOR_##name##_TABLE[(u >> 5) & 7] & (1 << (u & 31))); \
- }
- DECLARE_CTYPE_FN(ISALPHA)
- DECLARE_CTYPE_FN(ISALNUM)
- DECLARE_CTYPE_FN(ISSPACE)
- DECLARE_CTYPE_FN(ISDIGIT)
- DECLARE_CTYPE_FN(ISXDIGIT)
- DECLARE_CTYPE_FN(ISPRINT)
- DECLARE_CTYPE_FN(ISLOWER)
- DECLARE_CTYPE_FN(ISUPPER)
- extern const char TOR_TOUPPER_TABLE[];
- extern const char TOR_TOLOWER_TABLE[];
- #define TOR_TOLOWER(c) (TOR_TOLOWER_TABLE[(uint8_t)c])
- #define TOR_TOUPPER(c) (TOR_TOUPPER_TABLE[(uint8_t)c])
- char *tor_strtok_r_impl(char *str, const char *sep, char **lasts);
- #ifdef HAVE_STRTOK_R
- #define tor_strtok_r(str, sep, lasts) strtok_r(str, sep, lasts)
- #else
- #define tor_strtok_r(str, sep, lasts) tor_strtok_r_impl(str, sep, lasts)
- #endif
- #ifdef _WIN32
- #define _SHORT_FILE_ (tor_fix_source_file(__FILE__))
- const char *tor_fix_source_file(const char *fname);
- #else
- #define _SHORT_FILE_ (__FILE__)
- #define tor_fix_source_file(s) (s)
- #endif
- /* ===== Time compatibility */
- #if !defined(HAVE_GETTIMEOFDAY) && !defined(HAVE_STRUCT_TIMEVAL_TV_SEC)
- /** Implementation of timeval for platforms that don't have it. */
- struct timeval {
- time_t tv_sec;
- unsigned int tv_usec;
- };
- #endif
- void tor_gettimeofday(struct timeval *timeval);
- struct tm *tor_localtime_r(const time_t *timep, struct tm *result);
- struct tm *tor_gmtime_r(const time_t *timep, struct tm *result);
- #ifndef timeradd
- /** Replacement for timeradd on platforms that do not have it: sets tvout to
- * the sum of tv1 and tv2. */
- #define timeradd(tv1,tv2,tvout) \
- do { \
- (tvout)->tv_sec = (tv1)->tv_sec + (tv2)->tv_sec; \
- (tvout)->tv_usec = (tv1)->tv_usec + (tv2)->tv_usec; \
- if ((tvout)->tv_usec >= 1000000) { \
- (tvout)->tv_usec -= 1000000; \
- (tvout)->tv_sec++; \
- } \
- } while (0)
- #endif
- #ifndef timersub
- /** Replacement for timersub on platforms that do not have it: sets tvout to
- * tv1 minus tv2. */
- #define timersub(tv1,tv2,tvout) \
- do { \
- (tvout)->tv_sec = (tv1)->tv_sec - (tv2)->tv_sec; \
- (tvout)->tv_usec = (tv1)->tv_usec - (tv2)->tv_usec; \
- if ((tvout)->tv_usec < 0) { \
- (tvout)->tv_usec += 1000000; \
- (tvout)->tv_sec--; \
- } \
- } while (0)
- #endif
- #ifndef timercmp
- /** Replacement for timersub on platforms that do not have it: returns true
- * iff the relational operator "op" makes the expression tv1 op tv2 true.
- *
- * Note that while this definition should work for all boolean opeators, some
- * platforms' native timercmp definitions do not support >=, <=, or ==. So
- * don't use those.
- */
- #define timercmp(tv1,tv2,op) \
- (((tv1)->tv_sec == (tv2)->tv_sec) ? \
- ((tv1)->tv_usec op (tv2)->tv_usec) : \
- ((tv1)->tv_sec op (tv2)->tv_sec))
- #endif
- /* ===== File compatibility */
- int tor_open_cloexec(const char *path, int flags, unsigned mode);
- FILE *tor_fopen_cloexec(const char *path, const char *mode);
- int replace_file(const char *from, const char *to);
- int touch_file(const char *fname);
- typedef struct tor_lockfile_t tor_lockfile_t;
- tor_lockfile_t *tor_lockfile_lock(const char *filename, int blocking,
- int *locked_out);
- void tor_lockfile_unlock(tor_lockfile_t *lockfile);
- off_t tor_fd_getpos(int fd);
- int tor_fd_seekend(int fd);
- #ifdef _WIN32
- #define PATH_SEPARATOR "\\"
- #else
- #define PATH_SEPARATOR "/"
- #endif
- /* ===== Net compatibility */
- #if (SIZEOF_SOCKLEN_T == 0)
- typedef int socklen_t;
- #endif
- #ifdef _WIN32
- /* XXX Actually, this should arguably be SOCKET; we use intptr_t here so that
- * any inadvertant checks for the socket being <= 0 or > 0 will probably
- * still work. */
- #define tor_socket_t intptr_t
- #define SOCKET_OK(s) ((SOCKET)(s) != INVALID_SOCKET)
- #define TOR_INVALID_SOCKET INVALID_SOCKET
- #else
- /** Type used for a network socket. */
- #define tor_socket_t int
- /** Macro: true iff 's' is a possible value for a valid initialized socket. */
- #define SOCKET_OK(s) ((s) >= 0)
- /** Error/uninitialized value for a tor_socket_t. */
- #define TOR_INVALID_SOCKET (-1)
- #endif
- int tor_close_socket(tor_socket_t s);
- tor_socket_t tor_open_socket(int domain, int type, int protocol);
- tor_socket_t tor_accept_socket(tor_socket_t sockfd, struct sockaddr *addr,
- socklen_t *len);
- int get_n_open_sockets(void);
- #define tor_socket_send(s, buf, len, flags) send(s, buf, len, flags)
- #define tor_socket_recv(s, buf, len, flags) recv(s, buf, len, flags)
- /** Implementation of struct in6_addr for platforms that do not have it.
- * Generally, these platforms are ones without IPv6 support, but we want to
- * have a working in6_addr there anyway, so we can use it to parse IPv6
- * addresses. */
- #if !defined(HAVE_STRUCT_IN6_ADDR)
- struct in6_addr
- {
- union {
- uint8_t u6_addr8[16];
- uint16_t u6_addr16[8];
- uint32_t u6_addr32[4];
- } in6_u;
- #define s6_addr in6_u.u6_addr8
- #define s6_addr16 in6_u.u6_addr16
- #define s6_addr32 in6_u.u6_addr32
- };
- #endif
- /** @{ */
- /** Many BSD variants seem not to define these. */
- #if defined(__APPLE__) || defined(__darwin__) || defined(__FreeBSD__) \
- || defined(__NetBSD__) || defined(__OpenBSD__)
- #ifndef s6_addr16
- #define s6_addr16 __u6_addr.__u6_addr16
- #endif
- #ifndef s6_addr32
- #define s6_addr32 __u6_addr.__u6_addr32
- #endif
- #endif
- /** @} */
- #ifndef HAVE_SA_FAMILY_T
- typedef uint16_t sa_family_t;
- #endif
- /** @{ */
- /** Apparently, MS and Solaris don't define s6_addr16 or s6_addr32; these
- * macros get you a pointer to s6_addr32 or local equivalent. */
- #ifdef HAVE_STRUCT_IN6_ADDR_S6_ADDR32
- #define S6_ADDR32(x) ((uint32_t*)(x).s6_addr32)
- #else
- #define S6_ADDR32(x) ((uint32_t*)((char*)&(x).s6_addr))
- #endif
- #ifdef HAVE_STRUCT_IN6_ADDR_S6_ADDR16
- #define S6_ADDR16(x) ((uint16_t*)(x).s6_addr16)
- #else
- #define S6_ADDR16(x) ((uint16_t*)((char*)&(x).s6_addr))
- #endif
- /** @} */
- /** Implementation of struct sockaddr_in6 on platforms that do not have
- * it. See notes on struct in6_addr. */
- #if !defined(HAVE_STRUCT_SOCKADDR_IN6)
- struct sockaddr_in6 {
- sa_family_t sin6_family;
- uint16_t sin6_port;
- // uint32_t sin6_flowinfo;
- struct in6_addr sin6_addr;
- // uint32_t sin6_scope_id;
- };
- #endif
- int tor_inet_aton(const char *cp, struct in_addr *addr) ATTR_NONNULL((1,2));
- const char *tor_inet_ntop(int af, const void *src, char *dst, size_t len);
- int tor_inet_pton(int af, const char *src, void *dst);
- int tor_lookup_hostname(const char *name, uint32_t *addr) ATTR_NONNULL((1,2));
- void set_socket_nonblocking(tor_socket_t socket);
- int tor_socketpair(int family, int type, int protocol, tor_socket_t fd[2]);
- int network_init(void);
- /* For stupid historical reasons, windows sockets have an independent
- * set of errnos, and an independent way to get them. Also, you can't
- * always believe WSAEWOULDBLOCK. Use the macros below to compare
- * errnos against expected values, and use tor_socket_errno to find
- * the actual errno after a socket operation fails.
- */
- #if defined(_WIN32)
- /** Expands to WSA<b>e</b> on Windows, and to <b>e</b> elsewhere. */
- #define SOCK_ERRNO(e) WSA##e
- /** Return true if e is EAGAIN or the local equivalent. */
- #define ERRNO_IS_EAGAIN(e) ((e) == EAGAIN || (e) == WSAEWOULDBLOCK)
- /** Return true if e is EINPROGRESS or the local equivalent. */
- #define ERRNO_IS_EINPROGRESS(e) ((e) == WSAEINPROGRESS)
- /** Return true if e is EINPROGRESS or the local equivalent as returned by
- * a call to connect(). */
- #define ERRNO_IS_CONN_EINPROGRESS(e) \
- ((e) == WSAEINPROGRESS || (e)== WSAEINVAL || (e) == WSAEWOULDBLOCK)
- /** Return true if e is EAGAIN or another error indicating that a call to
- * accept() has no pending connections to return. */
- #define ERRNO_IS_ACCEPT_EAGAIN(e) ERRNO_IS_EAGAIN(e)
- /** Return true if e is EMFILE or another error indicating that a call to
- * accept() has failed because we're out of fds or something. */
- #define ERRNO_IS_ACCEPT_RESOURCE_LIMIT(e) \
- ((e) == WSAEMFILE || (e) == WSAENOBUFS)
- /** Return true if e is EADDRINUSE or the local equivalent. */
- #define ERRNO_IS_EADDRINUSE(e) ((e) == WSAEADDRINUSE)
- int tor_socket_errno(tor_socket_t sock);
- const char *tor_socket_strerror(int e);
- #else
- #define SOCK_ERRNO(e) e
- #define ERRNO_IS_EAGAIN(e) ((e) == EAGAIN)
- #define ERRNO_IS_EINPROGRESS(e) ((e) == EINPROGRESS)
- #define ERRNO_IS_CONN_EINPROGRESS(e) ((e) == EINPROGRESS)
- #define ERRNO_IS_ACCEPT_EAGAIN(e) ((e) == EAGAIN || (e) == ECONNABORTED)
- #define ERRNO_IS_ACCEPT_RESOURCE_LIMIT(e) \
- ((e) == EMFILE || (e) == ENFILE || (e) == ENOBUFS || (e) == ENOMEM)
- #define ERRNO_IS_EADDRINUSE(e) ((e) == EADDRINUSE)
- #define tor_socket_errno(sock) (errno)
- #define tor_socket_strerror(e) strerror(e)
- #endif
- /** Specified SOCKS5 status codes. */
- typedef enum {
- SOCKS5_SUCCEEDED = 0x00,
- SOCKS5_GENERAL_ERROR = 0x01,
- SOCKS5_NOT_ALLOWED = 0x02,
- SOCKS5_NET_UNREACHABLE = 0x03,
- SOCKS5_HOST_UNREACHABLE = 0x04,
- SOCKS5_CONNECTION_REFUSED = 0x05,
- SOCKS5_TTL_EXPIRED = 0x06,
- SOCKS5_COMMAND_NOT_SUPPORTED = 0x07,
- SOCKS5_ADDRESS_TYPE_NOT_SUPPORTED = 0x08,
- } socks5_reply_status_t;
- /* ===== Insecure rng */
- void tor_init_weak_random(unsigned seed);
- long tor_weak_random(void);
- #define TOR_RAND_MAX (RAND_MAX)
- /* ===== OS compatibility */
- const char *get_uname(void);
- uint16_t get_uint16(const void *cp) ATTR_NONNULL((1));
- uint32_t get_uint32(const void *cp) ATTR_NONNULL((1));
- uint64_t get_uint64(const void *cp) ATTR_NONNULL((1));
- void set_uint16(void *cp, uint16_t v) ATTR_NONNULL((1));
- void set_uint32(void *cp, uint32_t v) ATTR_NONNULL((1));
- void set_uint64(void *cp, uint64_t v) ATTR_NONNULL((1));
- /* These uint8 variants are defined to make the code more uniform. */
- #define get_uint8(cp) (*(const uint8_t*)(cp))
- static void set_uint8(void *cp, uint8_t v);
- static INLINE void
- set_uint8(void *cp, uint8_t v)
- {
- *(uint8_t*)cp = v;
- }
- #if !defined(HAVE_RLIM_T)
- typedef unsigned long rlim_t;
- #endif
- int set_max_file_descriptors(rlim_t limit, int *max);
- int tor_disable_debugger_attach(void);
- int switch_id(const char *user);
- #ifdef HAVE_PWD_H
- char *get_user_homedir(const char *username);
- #endif
- int get_parent_directory(char *fname);
- char *make_path_absolute(char *fname);
- char **get_environment(void);
- int spawn_func(void (*func)(void *), void *data);
- void spawn_exit(void) ATTR_NORETURN;
- #if defined(ENABLE_THREADS) && defined(_WIN32)
- #define USE_WIN32_THREADS
- #define TOR_IS_MULTITHREADED 1
- #elif (defined(ENABLE_THREADS) && defined(HAVE_PTHREAD_H) && \
- defined(HAVE_PTHREAD_CREATE))
- #define USE_PTHREADS
- #define TOR_IS_MULTITHREADED 1
- #else
- #undef TOR_IS_MULTITHREADED
- #endif
- int compute_num_cpus(void);
- /* Because we use threads instead of processes on most platforms (Windows,
- * Linux, etc), we need locking for them. On platforms with poor thread
- * support or broken gethostbyname_r, these functions are no-ops. */
- /** A generic lock structure for multithreaded builds. */
- typedef struct tor_mutex_t {
- #if defined(USE_WIN32_THREADS)
- /** Windows-only: on windows, we implement locks with CRITICAL_SECTIONS. */
- CRITICAL_SECTION mutex;
- #elif defined(USE_PTHREADS)
- /** Pthreads-only: with pthreads, we implement locks with
- * pthread_mutex_t. */
- pthread_mutex_t mutex;
- #else
- /** No-threads only: Dummy variable so that tor_mutex_t takes up space. */
- int _unused;
- #endif
- } tor_mutex_t;
- int tor_mlockall(void);
- #ifdef TOR_IS_MULTITHREADED
- tor_mutex_t *tor_mutex_new(void);
- void tor_mutex_init(tor_mutex_t *m);
- void tor_mutex_acquire(tor_mutex_t *m);
- void tor_mutex_release(tor_mutex_t *m);
- void tor_mutex_free(tor_mutex_t *m);
- void tor_mutex_uninit(tor_mutex_t *m);
- unsigned long tor_get_thread_id(void);
- void tor_threads_init(void);
- #else
- #define tor_mutex_new() ((tor_mutex_t*)tor_malloc(sizeof(int)))
- #define tor_mutex_init(m) STMT_NIL
- #define tor_mutex_acquire(m) STMT_VOID(m)
- #define tor_mutex_release(m) STMT_NIL
- #define tor_mutex_free(m) STMT_BEGIN tor_free(m); STMT_END
- #define tor_mutex_uninit(m) STMT_NIL
- #define tor_get_thread_id() (1UL)
- #define tor_threads_init() STMT_NIL
- #endif
- void set_main_thread(void);
- int in_main_thread(void);
- #ifdef TOR_IS_MULTITHREADED
- #if 0
- typedef struct tor_cond_t tor_cond_t;
- tor_cond_t *tor_cond_new(void);
- void tor_cond_free(tor_cond_t *cond);
- int tor_cond_wait(tor_cond_t *cond, tor_mutex_t *mutex);
- void tor_cond_signal_one(tor_cond_t *cond);
- void tor_cond_signal_all(tor_cond_t *cond);
- #endif
- #endif
- /** Macros for MIN/MAX. Never use these when the arguments could have
- * side-effects.
- * {With GCC extensions we could probably define a safer MIN/MAX. But
- * depending on that safety would be dangerous, since not every platform
- * has it.}
- **/
- #ifndef MAX
- #define MAX(a,b) ( ((a)<(b)) ? (b) : (a) )
- #endif
- #ifndef MIN
- #define MIN(a,b) ( ((a)>(b)) ? (b) : (a) )
- #endif
- /* Platform-specific helpers. */
- #ifdef _WIN32
- char *format_win32_error(DWORD err);
- #endif
- /*for some reason my compiler doesn't have these version flags defined
- a nice homework assignment for someone one day is to define the rest*/
- //these are the values as given on MSDN
- #ifdef _WIN32
- #ifndef VER_SUITE_EMBEDDEDNT
- #define VER_SUITE_EMBEDDEDNT 0x00000040
- #endif
- #ifndef VER_SUITE_SINGLEUSERTS
- #define VER_SUITE_SINGLEUSERTS 0x00000100
- #endif
- #endif
- #endif
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